This plugin allows WordPress to easily show customizable Erisian dates and time (decimal) instead of the standard Gregorian dates. No theme changes are required. The Discordian Date Function plugin provides a widget which will display the current date according to the Discordian calendar. This functional based on the Discordian Date plugin by Dan Johnson. And you can add the shortcode [today_ddate] in posts or pages for show the Discordian date of today.